Physics, 11.12.2019 23:31 herchellann302
Problem 2 the james webb space telescope, the telescope that will replace the hubble, has a primary mirror that is concave with focal length with magnitude |f| = |131.4m|. what is the radius of curvature of the mirror with the correct sign? select one of the following: (a) 0m (b) +65.7m (c) β65.7m (d) +131.4m (e) β131.4m (f) +262.8m (g) β262.8m
Answers: 3
Physics, 22.06.2019 13:00
At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius Οa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature Οr of its path, both as observed by the nonrotating skydiver.
Answers: 3
Physics, 22.06.2019 20:50
An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27Β°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)
Answers: 1
Problem 2 the james webb space telescope, the telescope that will replace the hubble, has a primary...
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